Thick-Film Hybrid STK672-110 Unipolar Fixed-Current Chopper

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Thick-Film Hybrid STK672-110 Unipolar Fixed-Current Chopper

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Ordering number EN6041
Thick-Film Hybrid
STK672-110
Unipolar Fixed-Current Chopper (Self-Excited PWM) Scheme Built-in Phase Signal Distribution
Two-Phase Stepping Motor Driver (Square Wave Drive) Output Current:
Overview
STK672-110 unipolar fixed-current chopper type 2-phase stepping motor driver hybrid features power MOSFETs output stage built-in phase signal distribution incorporation phase distribution allows STK672-110 control speed motor based frequency external input clock signal. supports types excitation motor control: 2-phase excitation phase excitation. also provides function switching motor direction.
Applications
Two-phase stepping motor drive send/receive facsimile units Paper feed copiers, industrial robots, other applications that require 2-phase stepping motor drive
inputs Schmitt inputs 40-k (typical: +100%) pull-up resistors built motor current changing Vref voltage. Since 0.22- current detection resistor built current each 0.22 applied voltage. input frequency range clock signal used motor speed control kHz. Supply voltage ranges: VCC1 VCC2 This supports motor operating currents 105°C, 2.65 25°C.
Package Dimensions
unit: 4168
[STK672-110]
Features
motor speed controlled frequency external clock signal (the CLOCK signal). excitation type switched according state (low high) MODE pin. mode 2-phase phase excitation rising edge clock signal. motor direction switching (the pin) provided.
32.5 26.0
SANYO products described contained herein have specifications that handle applications that require extremely high levels reliability, such life-support systems, aircraft's control systems, other applications whose failure reasonably expected result serious physical and/or material damage. Consult with your SANYO representative nearest before using SANYO products described contained herein such applications. SANYO assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO products described contained herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12799RM (OT) 6041-1/9
STK672-110
Specifications
Maximum Rating 25°C
Parameter Maximum supply voltage Maximum supply voltage Input voltage Output current Repeated avalanche capacity Allowable power dissipation Operating substrate temperature Junction temperature Storage temperature Symbol Tstg With arbitrarily large heat sink. MOSFET signal signal Logic input pins CLOCK Conditions Ratings -0.3 +7.0 -0.3 +7.0 2.65 +125 Unit
Allowable Operating Ranges 25°C
Parameter Maximum supply voltage Maximum supply voltage Input voltage Phase current Phase current Clock frequency Phase driver withstand voltage Symbol IOH1 IOH2 VDSS 105°C, CLOCK 80°C, CLOCK motor current (IOH) derating curve Minimum pulse width: 25°C) With signals applied With signals applied Conditions Ratings Unit
Electrical Characteristics 25°C,
Parameter supply current Output current diode forward voltage Output saturation voltage High-level input voltage Low-level input voltage Input current Vref input voltage Vref input bias current Note: fixed-voltage power supply must used. Symbol ICCO Ioave Vsat CLOCK With /3.8 each phase Vref 0.176 Pins pins) Pins pins) With pins ground level. Pull-up resistance: (typical) With 0.41 Conditions Ratings 0.45 0.73 0.50 1.02 Unit
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Internal Equivalent Circuit Block Diagram
Excitation mode selection
Phase excitation signal generation
Phase advance counter
STK672-110
Chopping circuit
time setting
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STK672-110 Sample Application Circuit
Two-phase stepping motor
least
minimize noise system, locate ground side capacitor above circuit close possible Insert resistor that discharge energy from capacitor directly applied CMOS this hybrid device. diode characteristics with less than equal (when this will smaller than CMOS input diode this case replaced with short without problem. Standard type input levels used inputs. open-collector type circuits used inputs, these circuit will high-impedance state high level inputs. result, chopping circuit noise cause input circuits operate incorrectly. prevent incorrect operation such noise, capacitors with values between 1000 must connected between pins capacitor with value between 1000 must connected between pins well open-collector output used RESETB (pin input.) Taking input bias current (IIB) characteristics into account, resistor must exceed following circuit (for lowered current over recommended application needs temporarily lower motor current. Here, value close must used resistor make transistor output saturation voltage possible.
Input Functions (CMOS input levels)
CLOCK MODE RESETB Function Reference clock motor phase current switching Excitation mode selection Motor direction switching System reset outputs cutoff. Applications must apply reset signal least when power first applied. Input conditions when operating Operates rising edge signal Low: 2-phase excitation High: phase excitation Low: (forward) High: (reverse) reset applied level
simple reset function formed from CO4, this application circuit. With CLOCK input held low, when supply voltage brought reset applied motor output phases driven. supply voltage rise time slow (over ms), motor output phases driven. Increase value capacitor check circuit operation again. timing chart concrete details circuit operation.
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STK672-110 Usage Notes system input pins [RESETB CLOCK (Input signal timing when power first applied)] shown timing chart, RESETB signal input required driver operate with timing which gate turned first. RESETB signal timing must have width least shown below. capacitor resistor application circuit form simple reset circuit that uses time constant rising time. However, when designing RESETB input based CMOS levels, application must have timing shown figure
Rise supply voltage
RESETB signal input
least
CLOCK signal
least
Figure RESETB CLOCK Signals Input Timing timing chart details CLOCK, MODE, CWB, other input pins. [Vref <Motor current peak value setting>] sample application circuit, peak value motor current (IO) RO1, RO2, described formula below.
Figure Motor Current Flowing into Driver Vref Here, hybrid internal current detection resistor Vref (R02 (R01 R02)) STK672-110 0.22 Allowable motor current operating range motor current (IO) must held within range corresponding area under curve shown figure example, operating substrate temperature 105°C, then must held under hold mode must held under
6041-5/9
STK672-110 Thermal design [Operating range which heat sink used] STK672-110 package structure that uses screws, recommended without heat sink. This section discusses safe operating range when heat sink used. maximum ratings specifications, Tcmax specified 105°C, when mounted actual product system, Tcmax value must never exceeded during operation. expressed formula below, thus range must stipulated that always under 105°C. Hybrid ambient temperature, Temperature increase across aluminum substrate shown figure value increases hybrid internal average power dissipation increases. shown figure increases with motor current. Here describe actual calculation using example shown motor current timing chart figure Since there periods when current flows periods when current during actual motor operation, cannot determined from data presented figure Therefore, calculate assuming that actual motor operation consists repetitions operation shown figure
Motor phase current (sink side)
Figure Motor Current Timing Motor rotation operation time Motor hold operation time Motor current time reduced, depending application. Single repeated motor operating cycle IO2: Motor current peak values structure motor windings, phase current positive negative current with pulse form. Note that figure presents concepts here, that on/off duty actual signals will differ. hybrid internal average power dissipation calculated from following formula. (Here, IO2) value calculated formula above under then from figure that operation allowed ambient temperature 60°C. While operating range when heat sink used determined from formula above, figure merely single example operating mode single motor. example, while figure shows 2-phase excitation motor, phase excitation used with 500-Hz clock frequency, drive will turned time dissipation will reduced that figure extremely difficult Sanyo calculate internal average power dissipation possible product conditions. After performing above rough calculations, always install hybrid actual product verify that substrate temperature does rise above 105°C.
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STK672-110 Timing Chart
2-phase excitation
Gate Gate Gate Gate
phase excitation
Gate Gate Gate Gate
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STK672-110
phase excitation (CWB)
Gate Gate Gate Gate
Switching from 2-phase phase excitation
Gate Gate Gate Gate
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STK672-110
Figure Operating region when
Figure
Motor:
Hybrid internal average power dissipation,
Motor current,
Continuous 2-phase excitation operation Motor used:R 0.63 0.62 data typical values.
Operating region hold mode
Operating Substrate Temperature,
Figure With heat sink, vertical, convection cooling
Motor current,
Substrate temperature rise,
Hybrid internal average power disspation,
Specifications SANYO products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer's products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer's products equipment. SANYO Electric Co., Ltd. strives supply high-quality high-reliability products. However, semiconductor products fail with some probability. possible that these probabilistic failures could give rise accidents events that could endanger human lives, that could give rise smoke fire, that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO products (including technical data, services) described contained herein controlled under applicable local export control laws regulations, such products must exported without obtaining export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written permission SANYO Electric Co., Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO product that intend use. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties.
This catalog provides information January 1999. Specifications information herein subject change without notice. 6041-9/9

Thick-Film Hybrid STK672-110 Unipolar Fixed-Current Chopper

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